rs12674822

Variant names:

• chr8-6531695-T-G
• rs12674822
• NM_024596.5:c.2214+31766T>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_024596.5(MCPH1):​c.2214+31766T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.496 in 151,982 control chromosomes in the GnomAD database, including 19,862 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.50 (19862 hom., cov: 33)
• Consequence: MCPH1 NM_024596.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0980
• Publications: 17 publications found

Genes affected

MCPH1 (HGNC:6954): (microcephalin 1) This gene encodes a DNA damage response protein. The encoded protein may play a role in G2/M checkpoint arrest via maintenance of inhibitory phosphorylation of cyclin-dependent kinase 1. Mutations in this gene have been associated with primary autosomal recessive microcephaly 1 and premature chromosome condensation syndrome. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2010]

ANGPT2 (HGNC:485): (angiopoietin 2) This gene belongs to the angiopoietin family of growth factors. The protein encoded by this gene is an antagonist of angiopoietin 1, and both angiopoietin 1 and angiopoietin 2 are ligands for the endothelial TEK receptor tyrosine kinase. Angiopoietin 2 is upregulated in multiple inflammatory diseases and is implicated in the direct control of inflammation-related signaling pathways. The encoded protein affects angiogenesis during embryogenesis and tumorigenesis, disrupts the vascular remodeling ability of angiopoietin 1, and may induce endothelial cell apoptosis. This gene serves a prognostic biomarker for acute respiratory distress syndrome. [provided by RefSeq, Aug 2020]

ANGPT2 Gene-Disease associations (from GenCC):

• lymphatic malformation 10

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.583 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCPH1	NM_024596.5	c.2214+31766T>G		intron_variant	Intron 12 of 13	ENST00000344683.10	NP_078872.3
ANGPT2	NM_001118887.2	c.444+637A>C		intron_variant	Intron 2 of 8	ENST00000629816.3	NP_001112359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10	c.2214+31766T>G		intron_variant	Intron 12 of 13	1	NM_024596.5	ENSP00000342924.5
ANGPT2	ENST00000629816.3	c.444+637A>C		intron_variant	Intron 2 of 8	1	NM_001118887.2	ENSP00000486858.2

Frequencies

GnomAD3 genomes AF: 0.496 AC: 75325 AN: 151864 Hom.: 19858 Cov.: 33

Gnomad AFR AF: 0.313

Gnomad AMI AF: 0.482

Gnomad AMR AF: 0.569

Gnomad ASJ AF: 0.563

Gnomad EAS AF: 0.498

Gnomad SAS AF: 0.382

Gnomad FIN AF: 0.538

Gnomad MID AF: 0.513

Gnomad NFE AF: 0.588

Gnomad OTH AF: 0.530

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.496 AC: 75342 AN: 151982 Hom.: 19862 Cov.: 33 AF XY: 0.491 AC XY: 36461 AN XY: 74302

African (AFR) AF: 0.313 AC: 12945 AN: 41418

American (AMR) AF: 0.570 AC: 8711 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.563 AC: 1952 AN: 3468

East Asian (EAS) AF: 0.498 AC: 2579 AN: 5178

South Asian (SAS) AF: 0.380 AC: 1828 AN: 4816

European-Finnish (FIN) AF: 0.538 AC: 5683 AN: 10562

Middle Eastern (MID) AF: 0.510 AC: 150 AN: 294

European-Non Finnish (NFE) AF: 0.588 AC: 39952 AN: 67952

Other (OTH) AF: 0.525 AC: 1103 AN: 2102

Alfa AF: 0.564 Hom.: 31359

Bravo AF: 0.493

Asia WGS AF: 0.383 AC: 1331 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	4.0
DANN	Benign	0.39
PhyloP100		0.098
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs12674822; hg19: chr8-6389216;